There is a thread on Avn Hist & Nost,by the Boeing TP covering flight-testing of the 747 Dreamlifter...
FD,we operated our mil C-130s generally to equivalent civvy Performance criteria,but could go to Mil Perf.for special tactical cases( authorised by God,or the Devil ),usually for strips/rough fields,contaminated,or in the case of our tankers up to overweight at 175k MAUW....actual performance was always as good or better than planning,except..... on one occasion out of Mountain Home ID. to Goose Bay,full crew plus `trappers/checkers checking other `new trappers`,and 8 pallets of equipment.Summertime in ID. is `fire-season ,and hot, new co-pilot leg,take-off and initial climb were ok,but we seemed to be down on climb perf....so,casually into the perf.graphs,and W&B,asked L/Master to recheck pallet weights..by now `checkers checkers are fully `awake`,get Nav. to revise fuel plan,as I estimate we`re overweight by 10k,tell ATC to revise TOC 2000FT lower than planned,etc,etc.Nav says we`ll make it to G-B, will revise as we go, decide we will not dump fuel,and carry on.. Arrive at G-B,and having requested an off-load and check weigh,it was found we were 8k overweight.Half the pallets had been loaded on one`line`,other half on another...Info passed back to Mountain Home, scales on one line were under-reading...Debiefing in the bar was interesting...!